Close binary systems in the perseus spiral arm. II. DN Cassiopeiae

Details Close binary systems in the perseus spiral arm. II. DN Cassiopeiae Close binary systems in the perseus spiral arm. II. DN Cassiopeiae

Aug 2001

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2001kfnt...17..313z&link_type=abstract

Kinematika i Fizika Nebesnykh Tel, vol. 17, no. 4, p. 313-325

Computer Science

Scientific paper

New UBVR photoelectric observations of the early type eclipsing variable DN Cas were obtained at the Maidanak Observatory in 1988-1999. We improved the bynary's ephemeris: Min I = JDH2441388.561(8) + 2.3109530(19)*E. All light curves of the DN Cas were solved by Lavrov's direct method, and the elements of the photometric orbit were obtained. The solutions were calculated in the framework of two hypothesises (S -> L and L -> S). We discuss the nature of the binary in these two cases. We preferred the latter hypothesis and estimated the expected absolute basic parameters for the components: M_h = 26.5 M_{sun}, M_c = 16.4 M_{sun}, R_h = 7.6 R_{sun}, R_{h,bol} = 6.7 R_{sun}, M_{h,bol} = -7.6(m) , M_{c,bol} = -6.6(m) . The age of the stars is 4.5-6* 10(6) yrs. The distance modulus for DN Cas is 10.9±0.6(m) . The binary is a probable member of the Cas OB6 association, a part of the Perseus spiral arm.

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